Double-acting pump



2 Sheets-Sheet 1. D. WEBSTER.

DOUBLE ACTING PUMP. l

Patented Ja.n17, 1888.

(No Model.)

I .71mm w m ,AZZVV I N. PETERS, Plwlu-Lihagnpher. Washingiou. D. C.

2 Sheets-Sheet 2. i

(No Model.)

vD. WEBSTER. DOUBLE ACTI-NG PUMP.

No. 376,696. vPatented Jam-17, 1888.'

w" I, 11./ A

NITED STATES PATENT EEICEQ.A

DOUBLE-ACTINGPUMP.

SPECIFICATION forming part of Letters Patent No. 376,696, dated January17, 1888. Application filed March 23,1887. vSerial No.7232.156. (Nomodel.)

I citizen of the United States, residing at Brooklyn, in the county ofGreen and State of fis cousin, have invent-ed a new and usefulImprovement in Double-Acting Pumps, of which the following,` is aspecification.

My invention relates to an improvement in doubleacting pumps; and itconsists in the peculiar construction and combination of de vices, thatwill be more fully set forth hereinafter, and particularly pointed outin the claim.

The object of my invention is to provide a single-cylinder andsingle-piston pump which is adapted to raise water at each stroke of thepiston in eitherdireotion, and this object I accomplish by the devicesillustrated in the accompanying drawings, in which- Figure l is avertical sectional view of a pump embodying my improvements, showing thepiston lowered. Fig. 2 is a similar View of the same, showing the pistonraised. Fig. 3 is a detailed elevation ofthe piston. Fig. 4t is avertical sectional view of the same, taken on the line x x of Fig. 3.

A represents the pumpcylinder, which is provided at its upper end withscrew-threads B and at its lower end with screw-threads C. In one sideofthe cylinder, near the upper end. thereof, is a countersunk opening.D, which extends through the side of the cylinder land is provided withtheinterior screw-threads, E.

F represents a @lack-valve, which is seated in the shoulder formed atthe inner end of the opening D and is adapt-ed to open inwardly towardthe interior of the cylinder.

G represents a hollow cylindrical sleeve, which is screwed into theopening jD and bears against the outer side of the rim of the valve, andforms the valveseat against which the valve closes. The said sleeve G isopen both at its inner and at its outer ends.

II represents a cap which screwsonto the upper end of the cylinder A toclose the same. In the center of the said cap is made-a verticalopening, I, and on the upper side of the cap, at the center thereof, isformeda packingbox, K.

L representsthe gland, which isadapted to screw into the packing-box,and the upper side of the gland is provided with a threaded opening, towhich is screwed thelower end of a deliverylpipe, M.

N represents a cap which is adapted toscrew upon the lower end of thecylinder to close the same, andthe said bottom cap, N, is provided witha vertical central opening, O, having an inwardly-opening clack-valve,P.

It representsha hollow' cylindrical piston,

which is arrangedgin the cylinder A, and is provided at its lower endwith the enlarged disk S and `has the screw-threads T at its upiper end.f

U represents a packing-ring, made of leather or other suitable material,which slips over the hollow piston and bears upon the upper side ofthedisk S and tits snugly against the inner side of the cylinder.Y l v Vrepresents a hollow cylindrical sleeve,

which lits over the piston and bears uponl the upper side of thepacking-ring U. A packing-ring, X, is slipped over the upper end of fthe piston and bears upon the upper side of the sleeve V. ,Y

Y represents a hollow oase or cage, which is screwed to the upper end ofthe piston and bears upon t-he upper sidefof the packing-ring X. In thelower side ofthe cage is a puppetvalve, Z, which is seated on the upperend of thevpiston and is adapted to close the same. y f

inder-cap and through the packingboxl and gland, and enters thedelivery-pipe M and is arranged concentrically therein, the said hollowpiston rod or tube being of smaller diameter than the delivery-pipe. Theupper end yof the piston rod or tubeis provided witha cage, C', havingopenings that communicate with the interior of the pipe M, and to thesaid cage is connected the lower end 0fapump-rod, D. f

The operation of my invention is as follows: The pump-cylinder issubmerged, andthepiston is .reciprooated vertically in the cylinder byoperating the'pump-rod D. On the downstrolre of the piston the valves Pand A are Ioo closed, the valve Z is open to permit the water in thelower portion of the pumpcylinder below the piston to be forced upwardthrough the piston into the piston cage or case, and from the latterthrough the hollow piston rod or tube B into the delivery-pipe M. Apartial vacuum is created in the upper portion of the cylinder by thedescending piston, and thereby the valve Fis caused to open inwardly, soas to permit the upper portion of the cylinder above the piston to belled with water. On the ensuing upstroke of the piston the valves Z andF close and the valve A opens, thus causing the water in the upperportion of the cylinder to be forced into the piston cage or case Y andup through the same and the pipe or piston-rod B into the deliverypipeM, as before. As the piston moves upward in the cylinder, the partialvacuum is created in the lower portion of the cylinder, and thereby thevalve Pis opened and water is admitted into the lower end of., thecylinder below the piston, ready to be forced upward on the ensuingdownward stroke of the piston, as before described.

From the foregoing it will be readily under stood that water is raisedat each stroke of the piston when the same is either raised or low'-ered.

. A double-acting pump thus constructed is extremely cheap and simple,is easily manufactured, is readily kept in repair, and is adapted to beused in driven wells and other contracted spaces.

Having thus described my invention, I claimw The herein-described pistonfor hollow-piston-rod pumps, comprising the cylinder R, having theflange or disk S at its lower end and screw-threaded at its upper end,the packingring U, resting on said flange, the cylindrical sleeve V,encircling the cylinder and resting on the packingring U, the packingring X, placed around the upper end of the cylinder and resting on theupper end of the sleeve V, the cage Y, screwed onto the upper end of thecylinder and having the puppetvalve A in its side near its upper end andthe arms Z2 depending from its top, the puppet-valve Z, seated on theupper end of the cylinder and limited in its play by the arlns Z2, andthe hollow piston-rod secured centrallyin the top ofthe cage and leadingtherefrom, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

DANIEL WEBSTER.

Vitnesses:

Anfris MCBRIDE, A. N. RANDALL.

